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COSRX Ultimate Nourishing Rice Overnight Spa Mask

⏱ 2 min read
Quick answer: Ultimate Nourishing Rice Overnight Spa Mask is COSRX's sleeping mask, built around Rice Extract and Niacinamide (B3). Dry, dull or winter-worn skin, and mature skin that finds gel masks insubstantial.

A thick, cream-textured overnight mask built on rice extract with niacinamide, sold as a nourishing final PM step. Where Laneige's is a water gel, this is closer to a rich cream you leave on — heavier, more emollient, better suited to skin that loses moisture overnight. It also works as a short wash-off mask, which is how a good many people prefer to use it.

🏷️ COSRX 🌙 Sleeping mask 💸 $18-26

What it is built around

🍚 Rice Extract🧫 Niacinamide (B3)

Who it suits

Dry, dull or winter-worn skin, and mature skin that finds gel masks insubstantial. Normal skin can use it once or twice a week. Oily and congestion-prone skin should be careful — a rich leave-on layer is exactly the sort of thing that clogs some people. Not for anyone already applying a heavy occlusive at night.

🥵 Dryness & dehydration🌟 Dullness & glow🥤 Dehydration (water-poor skin)🪨 Rough & uneven texture

How to use it

Last step at night over moisturiser, a thin layer, two or three times a week. Alternatively use it as a fifteen-minute wash-off mask and follow with your usual cream. Rinse in the morning. Hold off on stacking it over retinol nights until you know how your skin handles the occlusion.

⚠️ Worth knowing: It is rich enough to congest oily skin, and the reports of small bumps generally come from people using it every night rather than occasionally. The brightening implication around rice extract is weak — expect softness and a temporary glow, not tone correction. It carries a faint milky scent that a few people notice and dislike.

We describe products from public information and rank ingredients, never take payment for placement. Formulas change — always read the current ingredient list on the pack you buy.

Related K-beauty guides

🧫 Niacinamide (B3)🍚 Rice Extract🐌 COSRX

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✍️ Written & reviewed by the KoreaPlus Editorial team — dermatologist-informed, cosmetic-science researched & source-cited. Last reviewed: 2026-08-23.

General educational information using cosmetic structure-function wording — not medical advice. Always patch-test new actives. © KoreaPlus.